Exchangeable Aluminium as an Index of the Lime Requirement of the Laterite Soils of Kerala (Record no. 26211)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 05368nam a2200193Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220217112807.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 140128s9999 xx 000 0 und d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 631.4 |
| Item number | MUH/EX |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Muhamed Sakeer N M |
| 245 ## - TITLE STATEMENT | |
| Title | Exchangeable Aluminium as an Index of the Lime Requirement of the Laterite Soils of Kerala |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Vellanikkara |
| Name of publisher, distributor, etc. | Department of Soil Science and Agricultural Chemistry, College of Horticulture |
| Date of publication, distribution, etc. | 1997 |
| 502 ## - DISSERTATION NOTE | |
| Degree type | MVSc |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | An investigation was taken up to assess the lime requirement in terms of <br/>exchangeable aluminium, to correlate pH and lime requirement values with <br/>exchangeable aluminium content of the soil and to study the effect of liming on crop <br/>performance with special reference of exchangeable aluminium content of the soil. <br/>The study was carried out at College of Horticulture, Kerala Agricultural University, <br/>Vellanikkara, Thrissur during the period from 1993-95. The investigation consisted <br/>of three phases. <br/>A laboratory study with fifty surface soil samples from the rice growing <br/>tracts representing the laterite zone of Kerala viz., Malappuram, Palakkad and <br/>Thrissur districts revealed considerable amount of reserve acidity because of the <br/> <br/><br/> <br/>positive difference between pH(H2O) and <br/> <br/><br/>pH(KC1). pH showed significant <br/> <br/><br/> <br/>positive correlation with base saturation while it showed negative correlation with <br/>the acidity contributing factors. <br/>The exchangeable aluminium content of the soils ranged from 0.25 to <br/>2.54 cmol( +) kg -1. The soils in the pH range of 4.8 to 5.8 were predominant with <br/>exchangeable aluminium. Exchangeable aluminium obtained a higher r value of <br/>0.897** with exchange acidity than exchangeable hydrogen (r = 0.57**). Moreover <br/>exchangeable aluminium contributed 69 to 86 per cent towards the exchangeable <br/>acidity. This high contribution should be taken into account in timing and nutrient <br/>management of the soils. <br/> <br/>The pH dependent acidity contribution towards total acidity was 23-63 <br/>per cent, 34-76 per cent and 20-76 per cent respectively for Malappuram, Palakkad <br/>and Thrissur soils. Among the cations studied exchangeable calcium dominated in all <br/>soils followed by K, Mg and Na. Maximum base saturation value and organic <br/>carbon contents were observed in Malappuram soils. Lime requirement based on <br/>exchangeable aluminium recorded the lowest quantity of CaCO3 when compared to <br/>LR's based on Shoemaker et al. and total acidity. The soils had higher concentra- <br/>tions of total iron and aluminium contents. <br/>A pot culture experiment was conducted to study the effect of graded <br/>levels of lime application using the rice variety Triveni in three soils. Lime <br/>application increased the pH, exchangeable calcium, magnesium and sodium, <br/>available phosphorus, CEC, ECEC and base saturation of the soils while decreased <br/>exchangeable aluminium, hydrogen and potassium content of the soils. Different <br/>forms of acidities were maximum at the pre-planting stage but decreased as the crop <br/>matured. <br/>Lime application significantly increased the straw and yield characters of <br/>rice over control in all the three soils. Maximum yield was obtained with calcium at <br/>the rate of 0.5 and 1.0 times of exchangeable aluminium equivalent in soil (S1) <br/>having low exchangeable aluminium and those having medium (S2) and high (S3) <br/>contents respectively. <br/>The per cent composition of N, P, Ca and Mg increased significantly in <br/>the straw while that of iron and aluminium decreased with lime application. N, P, K <br/>and Ca content were observed maximum at tillering stage. The N, K, Ca and <br/> <br/> <br/>Mg content in the grain increased while that of P, Fe and Al decreased with graded <br/>levels of lime application. The total uptake of N, P, K, Ca and Mg by both straw <br/>and grain was found to increase while that of Fe and Al were found to decrease <br/>with increased levels of lime. <br/>Incubation study exhibited similar results and trend as in the pot culture <br/>experiment. The soil characters such as pH, available phosphorus, exchangeable Ca, <br/>Mg, Na, CEC, ECEC and base saturation were increased whereas exchangeable <br/>aluminium, iron, hydrogen and potassium, and different forms of acidities were <br/>decreased by the application of graded levels of lime. The soils kept under the <br/>submerged conditions exhibited good results than those kept at field capacity level. <br/>The lime requirement of soils calculated based on various methods <br/>revealed that the LR based on exchangeable aluminium content of soils required very <br/>less quantity of CaCO3. The exchangeable aluminium contributed 69 to 86 per cent <br/>towards exchangeable acidity. This high contribution of exchangeable aluminium <br/>should be taken into account in liming and nutrient management of the laterite soils. <br/>If we adopt this method for lime requirement determination it will be more efficient <br/>and economical. Thus the results of the present study point out the advantages in <br/>adopting the exchangeable aluminium as an index of the lime requirement of the <br/>laterite soils of Kerala. <br/><br/> |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Marykutty K C(Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://krishikosh.egranth.ac.in/handle/1/5810084358">https://krishikosh.egranth.ac.in/handle/1/5810084358</a> |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://krishikosh.egranth.ac.in/displaybitstream?handle=1/5810084358&fileid=a6e735b4-002b-44d7-a126-757c5f1ced17">https://krishikosh.egranth.ac.in/displaybitstream?handle=1/5810084358&fileid=a6e735b4-002b-44d7-a126-757c5f1ced17</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Theses |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 18/03/2014 | 631.4 MUH/EX | 171259 | 18/03/2014 | 18/03/2014 | Theses |